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KNOB ATTACHMENT. No.. 284,396. Patented Sept. 4, 1883.

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UNITED STATES PATENT i OEEICE.

THOMAS H. l?. DENNIS, OF OHELMSFORD, COUNTY OF ESSEX, ENGLAND.

KNOB ATTACHMENT.

SPECIFICATION' forming part `of Letters Patent No. 284,396, datedSeptember 4, 1883. n Application tiled May 22,1883. (No model.)'Patented in England May 17, 1882, No. 2,327.

To all whom it may concern:

Be it known that I, THOMAs HUNGATE PRESTON DENNIS, a subject of theQueen of Great Britain, resident at 2O High Street,l Chelmsford, 'in thecounty of Essex, England, engineer, have invented certain new and usefulimprovementsin the mode and means of attaching or fixing knobs andhandles to spindles or shanks, and of adjusting the same, (for which Ihave obtained a patent in Great Brit- L ain, No. 2,327,10eanng dat@ Mayi7, 1882,) of which the following is a specification.

My invention relates to a means for securing knobs and handles tospindles, and the Afully illustrated in the accompanying drawings, whichform a part of this specification, and in which- Figure 1 isalongitudinal section of my improved knob and spindle as applied to adoor. Fig. 2 is a similar view, in which the spindle carries a malethread, the knob a female thread, and the securing-screw both a Vmaleand female thread; and Figs. 3, 4, 5, and 6 represent sectional views ofmodications in non-essential details, all of which embody the principleof my invention. f

Referring to the drawings, in which similar letters of referenceindicate like parts in all the iigures, a designates the wood-work of anordinary door, and b -the lock. For convenienceof illustration anddescription, I will set forth the invention as thus applied; but it isobvious that the principle `involved would serve with equal efficiencyin other relations and combinations. v

` c designates the spindle, also of ordinary construction andadaptation, except that it is provided with a threaded portion, c. Iprefer the construction shown in Fig. 2, in which this threaded portionc is male. a

screw engage.

d designates the knob or handle, having a central threaded opening,through which the securing-screw e passes, and with the threads c2 ofwhich the external threads, e', of said This securing-screw e is tubularfor a portion of its length, and is internally provided withv a femalethread, e2, which thread engages the threaded portion c of the 6o shank.

In adjusting the knobin place I pass the knob over the spindle to thedistance required, and then insert the screw e, which immediatelyengages the thread of the shank or spindle, and when it has been forcedso as to be iiush with the knob, or slightly below flush, the parts aresecured together. i

When the knob is made of metal, the threads are readily made in thematerial of the knob; but when formed of wood or glass a metal threadsare formed.

Modifications in details of construction may l `understood from theforegoing description,

taken in connection with the drawings.

I am aware that it has been proposed to secure a knob to a spindle bymeans of a screw passed through J[he knob and secured to the spindle. Myinvention differs therefrom in providing Vthe knob as well as thespindle with screw-threads and engaging the threads ofthe screw with thethreads of both the spindle and knob, whereby a simpler and strongerconnection is effected than by other means.

Having thus `described my invention, what I claim is As a means forsecuring a knob to a spinL dle, and in combination with such Vknob andspindle, a single screw adapted to operate in connection with threadedportions of both knob and spindle, substantially as and for the 9 5purposes set forth.

In testimony whereof I have hereto set my hand this 2d dayof May, 1883.`a

THOMAS HUNGATE PRESTON DENNIS. Witnesses: v

GEO. DOWNING, i 8 Quality Court, London, Patent Agent.

JOHN DEAN, y 17 Gracechm'ch Street, London.

bushing is employed, in which bushing the

